View MAX3517EEP-T_6662601.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

general description the max3514/max3516/max3517 programmable-gain amplifiers are designed for use in catv upstream applications. the max3514/max3517 drive up to +61dbmv (qpsk) into a 75 load when driven with a +34dbmv nominal input signal. the max3516 drives up to +64dbmv (qpsk). both input and output ports are differential, requiring that an external balun be used at the output port. the variable gain feature provides greater than 56db of dynamic range, which is con- trolled by an spi 3-wire interface. gain control is available in 0.5db steps. the devices operate over a frequency range of 5mhz to 65mhz. the max3514 is a pin-for-pin compatible upgrade for the max3510. like the max3510, the max3514 is inter- nally matched for use with a 2:1 (voltage ratio) balun. the max3517 utilizes an external output resistor for greater load-matching flexibility, and offers the same performance as the max3514. the max3516 is a high- er power version of the max3514 with 3db more gain and output power capability, and is offered in a smaller thermally enhanced tssop-ep package. these devices operate from a single +5vdc supply and draw 120ma during transmit (100% duty cycle, +61dbmv out). the max3516 can be operated at up to +9vdc supply for improved harmonic distortion perfor- mance. the bias current is automatically adjusted based on the output level to increase efficiency. additionally, the devices are shut off between bursts to minimize noise and save power while still maintaining a match at the output port. shutdown mode disables all circuitry and reduces current consumption to 10? (typ). the max3514/max3517 are available in a 20-pin qsop package and the max3516 is available in a 20-pin tssop-ep package. all devices operate in the extend- ed industrial temperature range (-40? to +85?). ________________________applications docsis ? /eurodocsis ? and dvb cable modems opencable ? set-top boxes telephony-over-cable catv status monitors features ? accurate gain control ? gain programmable in 0.5db steps ? 56db of gain control range ? -55dbc harmonic distortion at 65mhz input ? low burst on/off transient ? high efficiency: 35ma at +34dbmv out 8ma transmit disable mode max3514/max3516/max3517 upstream catv amplifiers ________________________________________________________________ maxim integrated products 1 20 19 18 17 16 15 14 13 1 2 3 4 5 6 7 8 gnd v cc txen n.c. gnd gnd v cc gnd top view out+ out- cext (n.c.) n.c. cs gnd in- in+ 12 11 9 10 shdn gnd sclk sda qsop/tssop-ep max3514 max3516 max3517 exposed paddle* ( ) for max3517 only * max3516 only pin configuration 19-1826; rev 4; 9/06 evaluation kit available ordering information spi is a trademark of motorola corp. docsis/eurodocsis/opencable are trademarks of cablelabs. part temp range pin- package max3514 eep -40? to +85? 20 qsop max3514eep+ -40? to +85? 20 qsop max3516 eup -40? to +85? 20 tssop-ep* max3516eup+ -40? to +85? 20 tssop-ep* max3517 eep -40? to +85? 20 qsop max3517eep+ -40? to +85? 20 qsop typical operating circuit appears at end of data sheet. for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. * ep = exposed paddle. + denotes lead-free package.
max3514/max3516/max3517 upstream catv amplifiers 2 _______________________________________________________________________________________ absolute maximum ratings dc electrical characteristicsmax3514/max3516/max3517 (typical operating circuit; v cc = +4.75v to +5.25v, v gnd = 0, txen = shdn = high, t a = -40? to +85?. typical parameters are at v cc = +5v, t a = +25?, unless otherwise specified.) (note 1) stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. v cc , out+, out-................................................-0.3v to +10.0v input voltage levels (all inputs) .................-0.3v to (v cc + 0.3v) continuous input voltage (in+, in-) ...................................2vp-p continuous current (out+, out-) ...................................120ma continuous power dissipation (t a = +70?) 20-pin qsop (derate 12.3mw/c above t a = +70?). .988mw 20-pin tssop-ep (derate 27mw/? above t a = +70?) .......................2200mw operating temperature range .......................... -40? to +85? junction temperature ..................................................... +150? storage temperature range ............................ -65? to +150? lead temperature (soldering, 10s) ................................ +300? parameter symbol conditions min typ max units supply voltage v cc 4.75 5.25 v d7 = 1, gain code = 125 (a v = 27db) 120 150 supply current transmit mode (max3514/max3517) i cc d7 = 0, gain code = 100 (a v = 0db) 35 ma d7 = 1, gain code = 125 (a v = 31db) 160 195 supply current transmit mode (max3516) i cc d7 = 0, gain code = 94 (a v = 0.5db) 30 ma supply current transmit disable mode i cc txen = low 8 12 ma supply current low-power standby i cc shdn = low 10 ? logic inputs input high voltage v inh 2.0 v input low voltage v inl 0.8 v input high current i biash v inh = +3.6v 100 ? input low current i biasl v inl = 0 -100 ?
max3514/max3516/max3517 upstream catv amplifiers _______________________________________________________________________________________ 3 ac electrical characteristicsmax3514 (max3514 ev kit; v cc = +4.75v to +5.25v, v gnd = 0, p in = +34dbmv, txen = shdn = high, t a = -40? to +85?. typical parame- ters are at v cc = +5v, t a = +25?, unless otherwise specified.) (note 1) parameter symbol conditions min typ max units d7 = 1, gain code = 125, t a = 0 c to +85 c 26.7 27.7 28.7 d7 = 1, gain code = 110, t a = 0 c to +85 c 19.2 20.2 21.2 d7 = 1, gain code = 87, t a = 0 c to +85 c 7.7 8.7 9.7 d7 = 0, gain code = 115, t a = 0 c to +85 c 6.7 7.7 8.7 d7 = 0, gain code = 100, t a = 0 c to +85 c -0.8 0.2 1.2 d7 = 0, gain code = 80, t a = 0 c to +85 c -10.8 -9.8 -8.8 d7 = 0, gain code = 60, t a = 0 c to +85 c -20.8 -19.8 -18.8 voltage gain, f in = 5mhz (note 2) a v d7 = 0, gain code = 48, t a = 0 c to +85 c -27.0 -26.0 -25.0 db voltage gain, f in = 65mhz a v d7 = 1, gain code = 127, t a = -40 c to +85 c (notes 3, 4) 26.3 db v out = 61dbmv, f in = 5mhz to 42mhz -0.3 -0.5 gain rolloff (notes 3, 4) v out = 61dbmv, f in = 5mhz to 65mhz -1.0 -1.5 db f in = 5mhz to 65mhz, a v = -26db to +27db 0.5 f in = 5mhz to 65mhz, a v = -26db to +27db, any 2-bit transition of d0, d1 0.7 1 1.3 gain step size f in = 5mhz to 65mhz, d7 = 0, gain code = 115; to d7 = 1, gain code = 87 0.7 1.0 1.3 db transmit-disable mode noise txen = low, bw = 160khz, f in = 5mhz to 65mhz (note 3) -71 dbmv isolation in transmit-disable mode txen = low, f in = 5mhz to 65mhz (note 3) 60 db transmit mode noise bw = 160khz, f in = 5mhz to 65mhz, a v = -26db to +27db (note 3) -59 dbc transmit enable transient duration txen input rise/fall time < 0.1?, t a = +25 c (note 3) 2 ? transmit disable transient duration txen input rise/fall time < 0.1?, t a = +25 c (note 3) 2 ? d7 = 1, gain code = 125 (a v = 27db), t a = +25 c 30 100 transmit disable/transmit enable transient step size d7 = 0, gain code = 100 (a v = 0.2db), t a = +25 c 1 mv p-p input impedance z in f in = 5mhz to 65mhz, single-ended (note 3) 1 1.5 k output return loss f in = 5mhz to 42mhz in 75 system, d7 = 1 gain code = 125 (a v = 27db) (note 4) 10 db
max3514/max3516/max3517 upstream catv amplifiers 4 _______________________________________________________________________________________ parameter symbol conditions min typ max units output return loss in transmit- disable mode f in = 5mhz to 42mhz, in 75 system, txen = low (note 4) 10 db input tones at 42mhz and 42.2mhz, both +31dbmv, v out = +58dbmv/tone (note 3) -53 -47 two-tone third-order distortion im3 input tones at 65mhz and 65.2mhz, both +31dbmv, v out = +58dbmv/tone -49 dbc f in = 33mhz, v out = +61dbmv -55 -53 2nd-harmonic distortion (note 3) hd2 f in = 65mhz, v out = +61dbmv -55 -52 dbc f in = 22mhz, v out = +61dbmv -55 -50.5 3rd-harmonic distortion hd3 f in = 65mhz, v out = +61dbmv -55 -50.5 dbc a v = 27db, v in = +34dbmv to +38dbmv, f in = 42mhz 0.1 am to am am/am a v = 27db, v in = +34dbmv to +38dbmv, f in = 65mhz 0.1 db a v = 27db, v in = +34dbmv to +38dbmv, f in = 42mhz 1 am to pm am/pm a v = 27db, v in = +34dbmv to +38dbmv, f in = 65mhz 1 degrees ac electrical characteristicsmax3514 (continued) (max3514 ev kit; v cc = +4.75v to +5.25v, v gnd = 0, p in = +34dbmv, txen = shdn = high, t a = -40? to +85?. typical parame- ters are at v cc = +5v, t a = +25?, unless otherwise specified.) (note 1)
max3514/max3516/max3517 upstream catv amplifiers _______________________________________________________________________________________ 5 ac electrical characteristicsmax3516 (max3516 ev kit; v cc = +4.75v to +5.25v, v gnd = 0, p in = +34dbmv, txen = shdn = high, t a = -40? to +85?. typical parame- ters are at v cc = +5v, t a = +25?, unless otherwise specified.) (note 1) parameter symbol conditions min typ max units d7 = 1, gain code = 125, t a = 0 c to +85 c 30 31 32 d7 = 1, gain code = 119, t a = 0 c to +85 c 27 28 29 d7 = 1, gain code = 104, t a = 0 c to +85 c 19.5 20.5 21.5 d7 = 1, gain code = 81, t a = 0 c to +85 c 8 9 10 d7 = 0, gain code = 109, t a = 0 c to +85 c 7 8 9 d7 = 0, gain code = 94, t a = 0 c to +85 c -0.5 0.5 1.5 d7 = 0, gain code = 74, t a = 0 c to +85 c -10.5 -9.5 -8.5 d7 = 0, gain code = 54, t a = 0 c to +85 c -20.5 -19.5 -18.5 voltage gain, f in = 5mhz (note 2) a v d7 = 0, gain code = 42, t a = 0 c to +85 c -26.5 -25.5 -24.5 db voltage gain, f in = 65mhz a v d7 = 1, gain code = 127, t a = -40 c to +85 c (notes 3, 4) 28.1 db v out = 64dbmv, f in = 5mhz to 42mhz -0.3 -0.6 gain rolloff (notes 3, 4) v out = 64dbmv, f in = 5mhz to 65mhz -1.1 -1.7 db f in = 5mhz to 65mhz, a v = -26db to +30db 0.5 f in = 5mhz to 65mhz, a v = -26db to +30db, any 2-bit transition of d0, d1 0.6 1.0 1.4 gain step size f in = 5mhz to 42mhz, a v = -26db to +30db, d7 = 0, gain code = 109; to d7 = 1, gain code = 81 0.7 1.0 1.3 db transmit-disable mode noise txen = low, bw = 160khz, f in = 5mhz to 65mhz -71 dbmv isolation in transmit-disable mode txen = low, f in = 5mhz to 65mhz (note 3) 60 db transmit mode noise bw = 160khz, f in = 5mhz to 65mhz, a v = -26db to 27db (note 3) -59 dbc
max3514/max3516/max3517 upstream catv amplifiers 6 _______________________________________________________________________________________ parameter symbol conditions min typ max units transmit enable transient duration txen input rise/fall time < 0.1?, t a = +25 c (note 3) 2 ? transmit disable transient duration txen input rise/fall time < 0.1?, t a = +25 c (note 3) 2 ? d7 = 1, gain code = 119, (a v = 28db), t a = +25 c 30 100 transmit disable/transmit enable transient step size d7 = 0, gain code = 94, (a v = 0.5 db), t a = +25 c 1 mv p-p input impedance z in f in = 5mhz to 65mhz, single-ended (note 3) 1 1.5 k output return loss f in = 5mhz to 65mhz in 75 system d7 = 1, gain code = 125, (a v = 31db) (note 4) 10 db output return loss in transmit- disable mode f in = 5mhz to 65mhz in 75 system, txen = low (note 4) 10 db inp ut tones at 42m h z and 42.2m h z, b oth + 31d bm v , v out = + 58d bm v /tone -53.5 two-tone third-order distortion (note 3) im3 inp ut tones at 65m h z and 65.2m h z, b oth + 31d bm v , v out = + 58d bm v /tone -48.8 dbc f in = 33mhz, v out = +61dbmv -55 -53 f in = 33mhz, v out = +64dbmv -55 2nd-harmonic distortion (note 3) hd2 f in = 65mhz, v out = +61dbmv -55 -52 dbc f in = 22mhz, v out = +61dbmv -55 -50.5 f in = 22mhz, v out = +64dbmv -50 3rd-harmonic distortion hd3 f in = 65mhz, v out = +61dbmv -55 -50.5 dbc am to am am/am a v = 27db, v in = +34dbmv to +38dbmv, f in = 42mhz 0.1 db am to am am/am a v = 27db, v in = +34dbmv to +38dbmv, f in = 65mhz 0.1 db am to pm am/pm a v = 27db, v in = +34dbmv to +38dbmv, f in = 42mhz 1 degrees am to pm am/pm a v = 27db, v in = +34dbmv to +38dbmv, f in = 65mhz 1 degrees ac electrical characteristicsmax3516 (continued) (max3516 ev kit; v cc = +4.75v to +5.25v, v gnd = 0, p in = +34dbmv, txen = shdn = high, t a = -40? to +85?. typical parame- ters are at v cc = +5v, t a = +25?, unless otherwise specified.) (note 1)
max3514/max3516/max3517 upstream catv amplifiers _______________________________________________________________________________________ 7 ac electrical characteristicsmax3517 (max3517 ev kit; v cc = +4.75v to +5.25v, v gnd = 0, p in = +34dbmv, txen = shdn = high, t a = -40? to +85?. typical parame- ters are at v cc = +5v, t a = +25?, unless otherwise specified.) (note 1) parameter symbol conditions min typ max units d7 = 1, gain code = 125, t a = 0 c to +85 c 26.7 27.7 28.7 d7 = 1, gain code = 110, t a = 0 c to +85 c 19.2 20.2 21.2 d7 = 1, gain code = 90, t a = 0 c to +85 c 9.2 10.2 11.2 d7 = 1, gain code = 70, t a = 0 c to +85 c -0.8 0.2 1.2 d7 = 1, gain code = 115, t a = 0 c to +85 c 6.7 7.7 8.7 d7 = 1, gain code = 100, t a = 0 c to +85 c -0.8 0.2 1.2 d7 = 1, gain code = 80, t a = 0 c to +85 c -10.8 -9.8 -8.8 d7 = 0, gain code = 60, t a = 0 c to +85 c -20.8 -19.8 -18.8 voltage gain, f in = 5mhz a v d7 = 0, gain code = 48, t a = 0 c to +85 c -27.0 -26.0 -25.0 db gain step size f in = 5mhz to 65mhz, a v = -26db to +27db 0.5 db transmit-disable mode noise txen = low, bw = 160khz, f in = 5mhz to 65mhz -71 dbmv isolation in transmit-disable mode txen = low, f in = 5mhz to 65mhz 50 58 db transmit mode noise bw = 160khz, f in = 5mhz to 65mhz, a v = -26db to +27db (note 3) -60 -59 dbc transmit enable transient duration txen input rise/fall time < 0.1?, t a = +25 c (note 3) 2 ?
max3514/max3516/max3517 upstream catv amplifiers 8 _______________________________________________________________________________________ parameter symbol conditions min typ max units transmit disable transient duration txen input rise/fall time < 0.1?, t a = +25 c 2 ? d7 = 1, gain code = 125, (a v = 27db), t a = +25 c 30 100 transmit disable/transmit enable transient step size d7 = 0, gain code = 100, (a v = 0.2 db), t a = +25 c 1 mv p-p input impedance z in f in = 5mhz to 65mhz, single-ended (note 3) 1 1.5 k output return loss f in = 5mhz to 65mhz in 75 system d7 = 1, gain code = 125, (a v = 27db) (note 4) 8.3 db output return loss in transmit- disable mode f in = 42mhz, in 75 system txen = low (note 4) 10.5 db inp ut tones at 42m h z and 42.2m h z, b oth + 31d bm v , v out = + 58d bm v /tone -49.5 two-tone third-order distortion (note 2) im3 inp ut tones at 65m h z and 65.2m h z, b oth + 31d bm v , v out = + 58d bm v /tone -46.3 dbc f in = 33mhz, v out = +61dbmv -55 2nd-harmonic distortion hd2 f in = 65mhz, v out = +61dbmv -55 dbc f in = 22mhz, v out = +61dbmv -55 3rd-harmonic distortion hd3 f in = 65mhz, v out = +61dbmv -55 dbc am to am am/am a v = 27db, v in = +34dbmv to +38dbmv, f in = 42mhz 0.1 db am to am am/am a v = 27db, v in = +34dbmv to +38dbmv, f in = 65mhz 0.1 db am to pm am/pm a v = 27db, v in = +34dbmv to +38dbmv, f in = 42mhz 1 degrees am to pm am/pm a v = 27db, v in = +34dbmv to +38dbmv, f in = 65mhz 1 degrees ac electrical characteristicsmax3517 (continued) (max3517 ev kit; v cc = +4.75v to +5.25v, v gnd = 0, p in = +34dbmv, txen = shdn = high, t a = -40? to +85?. typical parame- ters are at v cc = +5v, t a = +25?, unless otherwise specified.) (note 1)
max3514/max3516/max3517 upstream catv amplifiers _______________________________________________________________________________________ 9 timing characteristics (v cc = 4.75v to 5.25v, v gnd = 0, txen = shdn = high, d7 = x, t a = +25?, unless otherwise specified.) parameter symbol conditions min typ max units sen to sclk setup time t sens 20 ns sen to sclk hold time t senh 10 ns sda to sclk setup time t sdas 10 ns sda to sclk hold time t sdah 20 ns sda pulse width high t datah 50 ns sda pulse width low t datal 50 ns sclk pulse width high t sclkh 50 ns sclk pulse width low t sclkl 50 ns note 1: guaranteed by design and characterization to ? sigma for t a < +25?, unless otherwise specified. note 2: ac gain correlated to dc gain measurements to ? sigma. note 3: guaranteed by design and characterization to ? sigma. note 4: does not include output matching; see output match in the applications section. 0 40 20 80 60 120 100 140 -50 0 25 -25 50 75 100 supply current vs. temperature max3514 toc01 temperature ( c) supply current (ma) transmit-enable mode high-power, gain code = 125 transmit-enable mode low-noise, gain code = 100 transmit-disable mode 0 40 20 80 60 120 100 140 04060 20 80 100 120 140 supply current vs. gain code max3514 toc02 gain code supply current (ma) high-power mode low-noise mode 28.0 28.2 28.4 28.6 28.8 29.0 29.2 29.4 29.6 4.6 4.8 5.0 5.2 5.4 voltage gain vs. supply voltage high-power mode max3514 toc03 supply voltage (v) voltage gain (db) t a = -40 c t a = +25 c t a = +85 c gain code = 127 __________________________________________typical operating characteristics (typical operating circuit; v cc = +5v, v in = +34dbmv, txen = shdn = high, f in = 20mhz, z load = 75 , t a = +25?, unless otherwise noted.) max3514/max3517
max3514/max3516/max3517 upstream catv amplifiers 10 ______________________________________________________________________________________ -27.0 -26.4 -26.6 -26.8 -26.2 -26.0 -25.8 -25.6 -25.4 -25.2 -25.0 4.6 4.8 5.0 5.2 5.4 voltage gain vs. supply voltage low-noise mode max3514 toc04 supply voltage (v) voltage gain (db) t a = -40 c t a = +25 c t a = +85 c gain code = 48 28.2 28.5 28.4 28.3 28.6 28.7 28.8 28.9 29.0 29.1 29.2 -40 10 -15 35 60 85 voltage gain vs. temperature high-power mode max3514 toc05 temperature ( c) voltage gain (db) gain code = 127 v cc = +4.75v v cc = +5.00v v cc = +5.25v -11.0 -10.4 -10.6 -10.8 -10.2 -10.0 -9.8 -9.6 -9.4 -9.2 -9.0 -40 10 -15 35 60 85 voltage gain vs. temperature low-noise mode max3514 toc06 temperature ( c) voltage gain (db) gain code = 80 v cc = +4.75v v cc = +5.00v v cc = +5.25v 1 100 1000 voltage gain vs. frequency high-power mode max3514 toc07 frequency (mhz) voltage gain (db) 10 40 -30 -20 -10 0 10 30 20 a b c d gain code: a = 125 b = 100 c = 87 d = 60 20 -70 1 1000 100 10 voltage gain vs. frequency low-noise mode -40 -60 0 -20 30 -30 -50 10 -10 max3514 toc08 frequency (mhz) voltage gain (db) a b c d e f gain code: a = 120, b = 115, c = 95, d = 75, e = 55, f = 35 -30 -35 -40 -20 -25 -15 -10 -5 0 5 10 15 20 25 30 30 50 70 90 110 voltage gain vs. gain code max3514 toc09 gain code voltage gain (db) 60 40 80 100 120 high-power mode low- noise mode 0 0.3 0.2 0.1 0.5 0.4 0.9 0.8 0.7 0.6 1.0 60 70 80 90 100 110 120 gain step vs. gain code high-power mode max3514 toc10 gain code gain step (db) 0 0.2 0.1 0.4 0.3 0.6 0.5 0.7 0.9 0.8 1.0 30 50 60 70 40 80 90 100 110 120 gain step vs. gain code low-noise mode max3514 toc11 gain code gain step (db) -55 -45 -50 -35 -40 -25 -30 -20 30 70 50 90 110 130 transmit noise vs. gain code max3514 toc12 gain code output noise (dbmv in 160khz) low-noise mode high-power mode _____________________________typical operating characteristics (continued) (typical operating circuit; v cc = +5v, v in = +34dbmv, txen = shdn = high, f in = 20mhz, z load = 75 , t a = +25?, unless otherwise noted.) max3514/max3517 (continued)
max3514/max3516/max3517 upstream catv amplifiers ______________________________________________________________________________________ 11 typical operating characteristics (continued) (typical operating circuit; v cc = +5v, v in = +34dbmv, txen = shdn = high, f in = 20mhz, z load = 75 , t a = +25?, unless otherwise noted.) max3514/max3517 (continued) -80 -70 -75 -60 -65 -55 -50 03040 10 20 50 60 70 2nd harmonic distortion vs. input frequency max3514 toc13 input frequency (mhz) 2nd harmonic distortion (dbc) 6dbmv, ln 20dbmv, ln 50dbmv, hp 61dbmv, hp -80 -70 -75 -60 -65 -55 -50 03040 10 20 50 60 70 3rd harmonic distortion vs. input frequency max3514 toc14 input frequency (mhz) 3rd harmonic distortion (dbc) 6dbmv, ln 20dbmv, ln 50dbmv, hp 61dbmv, hp 0.1 0140 80 40 power-up/down transients vs. gain code 1 10 100 max3514 toc15 gain code transient level (mvp-p) 20 60 100 120 high-power mode low-noise mode 0 -16 1 10 100 output return loss vs. frequency (75 system) -12 -14 max3514 toc16 frequency (mhz) output return loss (db) -8 -10 -6 -4 -2 high-power mode low-noise mode/ transmit disable max3514 toc17 output impedance (75 system) low noise mode/ transmit disable mode high-power mode -100 -80 -90 -60 -70 -40 -50 -30 -10 -20 0 500khz/div output spectrum max3514 toc18 (db) vout = 61dbmv = 0.25 1280ksps -100 -80 -90 -60 -70 -40 -50 -30 -10 -20 0 100khz/div output spectrum max3514 toc19 (db) vout = 61dbmv = 0.25 160ksps -100 -80 -90 -60 -70 -40 -50 -30 -10 -20 0 5.5mhz/div output spectrum max3514 toc20 (db) vout = 61dbmv = 0.25 1280ksps
max3514/max3516/max3517 upstream catv amplifiers 12 ______________________________________________________________________________________ 0 30 150 120 90 60 180 -50 0 25 -25 50 75 100 supply current vs. temperature max3514 toc21 temperature ( c) supply current (ma) transmit-enable mode, high-power, gain code = 125 transmit-enable mode, low-noise, gain code = 100 transmit-disable mode 0 60 30 120 90 150 180 06080 20 40 100 120 140 supply current vs. gain code max3514 toc22 gain code supply current (ma) high-power mode low-power mode 30.0 30.6 30.4 30.2 30.8 31.0 31.2 31.4 31.6 31.8 32.0 4.6 4.8 5.0 5.2 5.4 voltage gain vs. supply voltage high-power mode max3514 toc23 supply voltage (v) voltage gain (db) t a = -40 c t a = +25 c t a = +85 c gain code = 125 -27.0 -26.0 -26.5 -25.0 -25.5 -24.5 -24.0 4.6 5.0 4.8 5.2 5.4 voltage gain vs. supply voltage low-noise mode max3514 toc24 supply voltage (v) voltage gain (db) t a = -40 c t a = +25 c t a = +85 c gain code = 42 30.0 30.6 30.4 30.2 30.8 31.0 31.2 31.4 31.6 31.8 32.0 -40 10 -15 35 60 85 voltage gain vs. temperature high-power mode max3514 toc25 temperature ( c) voltage gain (db) v cc = 4.75v v cc = 5.25v v cc = 5.00v gain code = 125 -7.0 -6.4 -6.6 -6.8 -6.2 -6.0 -5.8 -5.6 -5.4 -5.2 -5.0 -40 10 -15 35 60 85 voltage gain vs. temperature low-noise mode max3514 toc26 temperature ( c) voltage gain (db) v cc = 4.75v v cc = 5.25v v cc = 5.00v gain code = 80 1 100 1000 voltage gain vs. frequency high-power mode max3514 toc27 frequency (mhz) voltage gain (db) 10 40 -30 -20 -10 0 10 30 20 a gain code: a = 125, b = 119, c = 100, d = 80, e = 60 b c d e 1 100 1000 voltage gain vs. frequency low-noise mode max3514 toc28 frequency (mhz) voltage gain (db) 10 20 -50 -40 -30 -20 -10 10 0 a gain code: a = 120, b = 109, c = 90, d = 70, e = 50, f =30 b c d e f -35 0 -5 -10 -15 -20 -25 -30 10 5 20 15 25 30 35 voltage gain vs. gain mode max3514 toc29 gain code voltage gain (db) 30 70 60 50 40 90 100 80 110 120 high-power mode low-noise mode typical operating characteristics (continued) (typical operating circuit; v cc = +5v, v in = +34dbmv, txen = shdn = high, f in = 20mhz, z load = 75 , t a = +25?, unless otherwise noted.) max3516
max3514/max3516/max3517 upstream catv amplifiers ______________________________________________________________________________________ 13 0 0.3 0.2 0.1 0.5 0.4 0.9 0.8 0.7 0.6 1.0 60 70 80 90 100 110 120 gain step vs. gain mode high-power mode max3514 toc30 gain code gain step (db) 0 0.2 0.1 0.4 0.3 0.6 0.5 0.7 0.9 0.8 1.0 30 50 60 70 40 80 90 100 110 120 gain step vs. gain code low-noise mode max3514 toc31 gain code gain step (db) -55 -45 -50 -35 -40 -25 -30 -20 30 70 50 90 110 130 transmit noise vs. gain code max3514 toc32 gain code output noise (dbmv in 160khz) high-power mode low-noise mode -85 -75 -80 -65 -70 -55 -60 -50 02030 10 40 50 60 70 2nd harmonic distortion vs. input frequency, v cc = 5.0v max3514 toc33 input frequency (mhz) 2nd harmonic distortion (dbc) 20dbmv, ln 50dbmv, hp 61dbmv, hp 64dbmv, hp -80 -70 -75 -60 -65 -50 -55 -45 02030 10 40 50 60 70 3rd harmonic distortion vs. input frequency, v cc = 5.0v max3514 toc34 input frequency (mhz) 3rd harmonic distortion (dbc) 64dbmv, hp 61dbmv, hp 50dbmv, hp 20dbmv, ln -80 -70 -75 -60 -65 -55 -50 03040 10 20 50 60 70 2nd harmonic distortion vs. input frequency, v cc = 7.0v max3514 toc35 input frequency (mhz) 2nd harmonic distortion (dbc) 20dbmv, ln 50dbmv, hp 61dbmv, hp 64dbmv, hp -80 -70 -75 -60 -65 -55 -50 03040 10 20 50 60 70 3rd harmonic distortion vs. input frequency, v cc = 7.0v max3514 toc36 input frequency (mhz) 3rd harmonic distortion (dbc) 64dbmv, hp 50dbmv, hp 20dbmv, ln 61dbmv, hp 0 100 140 power-up/down transients vs. gain code max3514 toc37 gain code transient level (mvp-p) 40 100 0.1 1 10 20 60 120 80 high-power mode low-noise mode 0 -16 110100 output return loss vs. frequency (75 system) -12 -14 max3514 toc38 frequency (mhz) output return loss (db) -8 -10 -6 -4 -2 high-power mode low-noise mode/ transmit-disable mode typical operating characteristics (continued) (typical operating circuit; v cc = +5v, v in = +34dbmv, txen = shdn = high, f in = 20mhz, z load = 75 , t a = +25?, unless otherwise noted.) max3516 (continued)
max3514/max3516/max3517 upstream catv amplifiers 14 ______________________________________________________________________________________ output impedance, 5mhz?5mhz (75 system) max3514 toc39 low-noise mode/transmit- disable mode high-power mode -100 -80 -90 -60 -70 -40 -50 -30 -10 -20 0 500khz/div output spectrum max3514 toc40 (db) vout = 61dbmv = 0.25 1280ksps -100 -80 -90 -60 -70 -40 -50 -30 -10 -20 0 100khz/div output spectrum max3514 toc41 (db) vout = 61dbmv = 0.25 160ksps -100 -80 -90 -60 -70 -40 -50 -30 -10 -20 0 5.5mhz/div output spectrum max3514 toc42 (db) vout = 61dbmv = 0.25 1280ksps typical operating characteristics (continued) (typical operating circuit; v cc = +5v, v in = +34dbmv, txen = shdn = high, f in = 20mhz, z load = 75 , t a = +25?, unless otherwise noted.) max3516 (continued)
max3514/max3516/max3517 upstream catv amplifiers ______________________________________________________________________________________ 15 pin description pin name function 1, 3, 7, 11 gnd ground 2v cc programmable-gain amplifier (pga) +5v supply. bypass to pin 4 with a decoupling capacitor as close to the part as possible. 4 gnd pga rf ground. as with all ground connections, maintain the shortest possible (low-inductance) length to the ground plane. 5 in+ positive pga input. along with in-, this port forms a high-impedance differential input to the pga. driving this port differentially increases the rejection of second-order distortion at low output levels. 6 in- negative pga input. when not used, this port must be ac-coupled to ground. see in+. 8 cs serial-interface enable. ttl-compatible input. see the serial interface section. 9 sda serial-interface data. ttl-compatible input. see the serial interface section. 10 sclk serial-interface clock. ttl-compatible input. see the serial interface section. 12 shdn shutdown. when shdn is set low, all functions (including the serial interface) are disabled. 13, 17 n.c. no connection 14 cext rf output bypass. bypass to ground with a 0.1? capacitor. (n.c. for max3517.) 15 out- negative output. along with out+, this port forms a 300 impedance output. this port is matched to a 75 load using a 2:1 (voltage ratio) transformer. 16 out+ positive output. see out-. 18 txen transmit enable. drive txen high to place the device in transmit-enable mode. 19 v cc output amplifier bias, +5v supply. bypass to pin 20 with a decoupling capacitor as close to the part as possible. 20 gnd output amplifier bias ground. as with all ground connections, maintain the shortest possible (low- inductance) length to the ground plane. exposed paddle gnd ground (max3516 only)
max3514/max3516/max3517 upstream catv amplifiers 16 ______________________________________________________________________________________ detailed description programmable-gain amplifier the pga consists of the variable-gain amplifier (vga) and the digital-to-analog converter (dac), which pro- vide better than 56db of output level control in 0.5db steps. the pga is implemented as a programmable gilbert-cell attenuator. the gain of the pga is deter- mined by a 7-bit word (d6?0) programmed through the serial data interface (tables 1 and 2). specified performance is achieved when the input is driven differentially. the device may be driven single ended. to drive the device in this manner, one of the input pins must be capacitively coupled to ground. use a capacitor value large enough to allow for a low- impedance path to ground at the lowest frequency of operation. for operation down to 5mhz, a 0.001? capacitor is suggested. output amplifiers the output amplifiers are class a differential amplifiers capable of driving +61dbmv (qpsk, max3514) differ- entially. this architecture provides superior even-order distortion performance but requires that a transformer be used to convert to a single-ended output. in trans- mit-disable mode, the output amplifiers are powered down. a resistor is across the output so that the output impedance remains matched when the amplifier is in transmit-disable mode. disabling the output devices also results in low output noise. max3514/max3516 to match the output impedance to a 75 load, the transformer must have a turns ratio (voltage ratio) of 2:1 (4:1 impedance ratio). the differential amplifier is biased directly from the +5v supply using the center tap of the output transformer. this provides a signifi- cant benefit when switching between transmit mode and transmit-disable mode. stored energy due to bias currents will cancel within the transformer and prevent switching transients from reaching the load. max3517 the max3517 uses external matching resistors to allow matching to various load impedances through suitable values of matching resistors and transformer turns ratios. serial interface the serial interface has an active-low enable ( cs ) to bracket the data, with data clocked in msb first on the rising edge of sclk. data is stored in the storage latch on the rising edge of cs . the serial interface controls functional diagram max3514 max3516 max3517 gnd sda sclk out- out+ *max3514/max3516 only in+ in- v cc txen cext * bias control shdn high power low noise d/a converter serial data interface cs
max3514/max3516/max3517 upstream catv amplifiers ______________________________________________________________________________________ 17 the state of the pga and the output amplifiers. tables 1 and 2 show the register format. serial-interface timing is shown in figure 1. applications information high-power and low-noise modes the max3514/max3516/max3517 have two transmit modes, high power (hp) and low noise (ln). each of these modes is actuated by the high-order bit d7 of the 8-bit programming word. when d7 is a logic 1, hp mode is enabled. when d7 is a logic 0, ln mode is enabled. each of these modes is characterized by the activation of a distinct output stage. in hp mode, the output stage exhibits 15db higher gain than ln mode. the lower gain of the ln output stage allows for significantly lower output noise and lower transmit/transmit-disable tran- sients. the full range of gain codes (d6?0) may be used in either mode. for docsis applications, hp mode is rec- ommended for output levels at or above +42dbmv (max3514, d7 = 1, gain code = 87), ln mode when the output level is below +42dbmv (max3514, d7 = 0, gain code = 115). shutdown mode in normal operation, the shutdown pin ( shdn ) is held high. when shdn is taken low, all circuits within the ic are disabled. only leakage currents flow in this state. data stored within the serial-data interface latches will a. t sens b. t sdas c. t sdah d. t sclkl e. t sclkh f. t senh g. t datah /t datal d0 d7 d6 d5 a g b c de f d4 d3 d2 d1 figure 1. serial-interface timing diagram bit mnemonic description msb 7 d7 high-power/low-noise mode select 6 d6 gain code, bit 6 5 d5 gain code, bit 5 4 d4 gain code, bit 4 3 d3 gain code, bit 3 2 d2 gain code, bit 2 1 d1 gain code, bit 1 lsb 0 d0 gain code, bit 0 table 1. serial-interface control word table 2. chip state control bits shdn txen d7 d6 d5 d4 d3 d2 d1 d0 gain code (decimal) gain* (db) states 0 x x x x x x x x x shutdown mode 1 0 x x x x x x x x transmit-disable mode 1 1 1 x x x x x x x transmit-enable mode, high power 1 1 0 x x x x x x x transmit- enable mode, low noise 1 1 0 0 1 1 0 0 0 0 48 -26 1 1 0 1 0 1 0 0 0 0 80 -10 1 1 0 1 1 1 0 0 1 1 115 8 1 1 1 1 0 1 0 1 1 1 87 9 1 1 1 1 1 0 1 1 1 0 110 20 1 1 1 1 1 1 1 1 0 1 125 28 * typical gain at +25?, v cc = 5.0v
max3514/max3516/max3517 upstream catv amplifiers 18 ______________________________________________________________________________________ be lost upon entering this mode. current consumption is reduced to 10? (typ) in shutdown mode. output match max3514/max3516 when used in conjunction with a 2:1 voltage-ratio trans- former, the max3514/max3516 are internally resistively matched to 75 . this internal resistor is across the out+ and out- terminals. to improve the match at the high end of the frequency range (65mhz), a reactive match may be employed as part of the ensuing diplex filter. a series inductor (typ 180nh) followed by a shunt capacitor (typ 33?) can be placed directly after the output transformer. this match will also improve the gain flatness substantially. as mentioned above, the matching components may be incorporated into the diplex filter design. optimize the input impedance of the diplex filter to be 35 + j35 (typ) at 65mhz when using the specified output transformer. max3517 the max3517 does not have an internal matching resistor. this allows the device performance to be opti- mized for various load impedances. when 300 resistors are placed across the output ter- minals of the device, performance identical to the max3514 will result. if an impedance higher than 300 is used, additional gain will result. note also that a 2:1 voltage-ratio output transformer is not needed. when operating the device with arbitrary output resis- tance and xfmr turns ratio, take care not to exceed the allowable power dissipation (see the absolute maximum ratings ). transformer to match the output of the max3514/max3516 to a 75 load, a 2:1 voltage-ratio transformer is required. this transformer must have adequate bandwidth to cover the intended application. note that most rf transformers specify bandwidth with a 50 source on the primary and a matching resistance on the secondary winding. operating in a 75 system will tend to shift the low-fre- quency edge of the transformer bandwidth specification up by a factor of 1.5 due to primary inductance. keep this in mind when specifying a transformer. bias to the output stage is provided through the center tap on the transformer primary. this greatly diminishes the on/off transients present at the output when switch- ing between transmit and transmit-disable modes. commercially available transformers typically have adequate balance between half-windings to achieve substantial transient cancellation. finally, keep in mind that transformer core inductance varies proportionally with temperature. if the application requires low temperature extremes (less than 0?), adequate primary inductance must be present to sus- tain low-frequency output capability as temperatures drop. in general, this will not be a problem as modern rf transformers have adequate bandwidth. input circuit to achieve rated performance, the inputs of the max3514/max3516/max3517 must be driven differen- tially with an appropriate input level. the differential input impedance is approximately 1.5k . most applica- tions will require a differential low-pass filter preceding the device. the filter design will dictate a terminating impedance of a specified value. place this load imped- ance across the ac-coupled input pins (see the typical operating circuit ). the max3514/max3517 have sufficient gain to pro- duce an output level of +61dbmv (qpsk through a 2:1 transformer) when driven with a +34dbmv input signal. the max3516 provides an additional 3db of gain and output level. when a lower input level is present, the maximum output level will be reduced proportionally and output linearity will increase. if an input level greater than +34dbmv is used, the 3rd-order distortion performance will degrade slightly. if single-ended sources drive the max3514/max3516/ max3517, one of the input terminals must be capaci- tively coupled to ground (in+ or in-). the value of this capacitor must be large enough to look like a short cir- cuit at the lowest frequency of interest. for operation at 5mhz with a 75 source impedance, a value of 0.001? will suffice. layout issues a well-designed pc board is an essential part of an rf circuit. for best performance, pay attention to power- supply layout issues, as well the output circuit layout. output circuit layout the differential implementation of the max3514/ max3516/max3517s?output has the benefit of signifi- cantly reducing even-order distortion, the most signifi- cant of which is 2nd-harmonic distortion. the degree of distortion cancellation depends on the amplitude and phase balance of the overall circuit. it is important to keep the trace lengths from the output pins equal.
max3514/max3516/max3517 upstream catv amplifiers ______________________________________________________________________________________ 19 power-supply layout for minimal coupling between different sections of the ic, the ideal power-supply layout is a star configuration. this configuration has a large-value decoupling capac- itor at the central power-supply node. the power-sup- ply traces branch out from this node, each going to a separate power-supply node in the circuit. at the end of each of these traces is a decoupling capacitor that pro- vides a very low impedance at the frequency of inter- est. this arrangement provides local power-supply decoupling at each power-supply pin. the power-supply traces must be made as thick as practical. ground inductance degrades distortion performance. therefore, ground plane connections to pin 4 and pin 20 should be made with multiple vias if necessary. exposed paddle thermal considerations the exposed paddle (ep) of the max3516? 20-pin tssop-ep package provides a low thermal-resistance path to the die. it is important that the pc board on which the max3516 is mounted, be designed to conduct heat from this contact. in addition, the ep should be provided with a low inductance path to electrical ground. it is recommended that the ep be soldered to a ground plane on the pc board, either directly or through an array of plated via holes. typical operating circuit 12 shdn control logic max3514 max3516 max3517 18 5 txen in+ 6 2 4 3 in- +5v v cc gnd gnd 20 gnd 19 output rext* rext* +5v 2:1 0.1 f 0.1 f 0.1 f 0.001 f 0.001 f control logic * max3517 only ** max3514/max3516 only 0.1 f +5v v cc 16 15 out+ out- 14 ** cext 11 10 9 8 gnd sclk sda cs 7 gnd 1 gnd input + - anti-alias filter chip information transistor count: 1006
max3514/max3516/max3517 upstream catv amplifiers 20 ______________________________________________________________________________________ tssop4.40mm.eps package outline, tssop 4.40mm body 21-0066 1 1 g package information (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation, go to www.maxim-ic.com/packages .)
upstream catv amplifiers max3514/max3516/max3517 maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circu it patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 ____________________ 21 2006 maxim integrated products is a registered trademark of maxim integrated products, inc. qsop.eps f 1 1 21-0055 package outline, qsop .150", .025" lead pitch package information (continued) (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation, go to www.maxim-ic.com/packages .) revision history pages changed at rev 4: 5, 21

▲Up To Search▲

Price & Availability of MAX3517EEP-T

	To Download MAX3517EEP-T Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .